It's good for everyone that the rivalry between Durant and Harden is over

There's no rivalry but rather both players are just doing their job.
It's just that James Harden is the main scorer on his previous team that's why when being transferred to the Nets, he doesn't change his usual gameplay. Move forward now and let's see if James Harden will have a nice run in Philadelphia Sixers.
The same goes with Ben Simmons playing alongside Kevin Durant.